Office Training

Yesterday the person I share a small office with and I decided that we were going to help each other out in terms of health and fitness. Were both getting closer to 30 (I'm 25 and he's 27) and decided we should be in the best physical and mental condition of our lives. Our first decision was relating to exercise. It's a small step, but to break up the day, and to make our desk jobs a little more physical, we decided that every hour (I am going to lobby we move it to every 30 minutes) at work we are going to complete a certain set of reps of one exercise. The condition was that we can't do anything too crazy, as we don't want to get all sweaty and then have to go into a meeting with sweat stains and red faces. Yesterday it was 20 pushups every hour. I actually got him to do knuckle pushups for the first time in his life. Congrats to him. That little diversion did a great job of getting the blood flowing and waking us up every hour.

I think we'll be OK with the physical exercises at work, but we weren't sure how to work the mental ones; trivia, quick verbal math quiz, riddles? Any suggestions?